How to Replace a Trimmer Cutting Line

A trimmer can also be used as an edger to trim along sidewalks.

A lawn trimmer -- also called an edger -- is a handy gardening tool for quickly trimming weeds and cutting those blades of grass in hard-to-reach places. There are several types, but most use either a single- or dual-line rotating head. There is a spool of trimmer line inside the head, and the line, spinning at very high revolutions per minute, does the cutting. Through use, the line can wear down or break, so more line must be fed out from the spool. When all the line has been used up, replace the spool and your trimmer will be back in action.

1

Unplug the trimmer if it is an electric-powered model. If it is gas-powered, ensure the ignition switch is turned to "Off."

2

Turn the trimmer over and check that the area between the hub and the shield is not clogged with wet grass or mud. Use a screwdriver to dig out any obstructions.

3

Release the hub from the motor shaft. Depending on the model, most hubs have tabs you must push or pull to unlock it from the shaft. Some models may have a cap to unscrew. Consult your owner's manual if it isn't apparent by looking at the tabs. Pull the hub straight off the shaft. then remove the trimmer line spool from the hub. Remove and discard any trimmer line still remaining on the spool.

4

Remove the cap off of the hub, then remove the spool from inside the hub. Remove and discard any trimmer line still remaining on the spool.

5

Insert the new trimmer through one of the holes in the center of the spool. Tightly wind approximately 15 to 20 feet of the new line onto the spool in the direction indicated on the spool. Keep the coils tight, working back and forth in overlapping rows.

6

Clip the end of the trimmer line into the notch or recess along the outer edge of the spool. Cut the line, leaving approximately 6 to 8 inches of line free.

7

Insert the spool into the hub, while you guide the free length of line through the hole in the hub. Secure the spool into place, then reinstall the hub onto the motor shaft.

Things You Will Need

Screwdriver

Trimmer owner's manual

Warning

Be sure to purchase the correct size trimmer line. Lines come in various thicknesses, expressed in thousandths of an inch. For example, .065-inch line is the most common. Sizes .095, .105 and .133 are for medium and heavy-duty work. Your owner's manual will say which size line your trimmer uses.

About the Author

Emrah Oruc is a general contractor, freelance writer and former race-car mechanic who has written professionally since 2000. He has been published in "The Family Handyman" magazine and has experience as a consultant developing and delivering end-user training. Oruc holds a Bachelor of Arts in political science and a minor in economics from the University of Delaware.